Hi Howard,
The 2073 seems to beworking fine, good audio and plenty of volume, I've run it turned all the way up to drive the NesCAF, since you lose some volume as you crank down the bandwidth, and it's been fine, no problems at all.
Haven't done a pop fix yet, still mulling over the options. In the mean time I use the old trick of putting the phones just off the ear
73 Mike
Michael Aiello